SQL Anywhere Licenses v9 with v16 and v16 with v9

Have a customer running Sybase SQL Anywhere v9.

They currently have nine networked client licenses.

They need an additional seven.

The current SAP license offering is v16 networked client licenses.

Will v16 networked client licenses work with v9 SQL Anywhere?

Additionally,

The customer will eventually upgrade to SQL Anywhere v16.

Will their current v9 networked client licenses work with SQL Anywhere v16?

Thanks.